Upgrading my PC and was wondering if the bits below are alright and a good price. I've not upgraded in a long time so I'm a bit unsure. Typical reason for upgrading new game runs like a dog. Intel Core 2 Duo E6400, 2.13Ghz - £167.90 ASUS P5B i965 - £97.27 1Gb (2X512Mb) Corsair TwinX XMS2, DDR2 PC6400 (800), 240 Pin, Non-ECC Unbuffered, CAS 5-5-5-15 - £73.00 512MB ASUS Radeon X1900 XT PCI-E (x16) - £229.00 My current set up is: 2.8Ghz Prescott, 1Gb Ram, Nvidia 6800, 120Gb sata Hd. Will i notice a big difference?